Solve the Quadratic Equation: Find x in x² - 20 = 5

To solve this quadratic equation $x^2 - 20 = 5$, we will follow these steps:

• Step 1: First, add 20 to both sides of the equation to isolate the $x^2$ term:

$x^2 - 20 + 20 = 5 + 20$

This simplifies to:

$x^2 = 25$

• Step 2: Next, take the square root of both sides to solve for $x$:

$x = \pm \sqrt{25}$

$x = \pm 5$

Therefore, the solutions to the equation are:

$x = 5$ and $x = -5$

Thus, the correct answer choice is:

• $\pm 5$ from the provided options.

The correct solution to the problem is $\pm 5$.